<?php
/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: Regex.php 24593 2012-01-05 20:35:02Z matthew $
 */
/**
 *
 * @see Zend_Validate_Abstract
 */
require_once 'Zend/Validate/Abstract.php';

/**
 *
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
class Zend_Validate_Regex extends Zend_Validate_Abstract {

    const INVALID = 'regexInvalid';

    const NOT_MATCH = 'regexNotMatch';

    const ERROROUS = 'regexErrorous';

    /**
     *
     * @var array
     */
    protected $_messageTemplates = array(self::INVALID => "Invalid type given. String, integer or float expected", self::NOT_MATCH => "'%value%' does not match against pattern '%pattern%'", self::ERROROUS => "There was an internal error while using the pattern '%pattern%'");

    /**
     *
     * @var array
     */
    protected $_messageVariables = array('pattern' => '_pattern');

    /**
     * Regular expression pattern
     * @var string
     */
    protected $_pattern;

    /**
     * Sets validator options
     * @param string|Zend_Config $pattern
     * @throws Zend_Validate_Exception On missing 'pattern' parameter
     * @return void
     */
    public function __construct ($pattern) {
        if ($pattern instanceof Zend_Config) {
            $pattern = $pattern -> toArray ();
        }
        if (is_array ($pattern)) {
            if (array_key_exists ('pattern', $pattern)) {
                $pattern = $pattern['pattern'];
            } else {
                require_once 'Zend/Validate/Exception.php';
                throw new Zend_Validate_Exception ("Missing option 'pattern'");
            }
        }
        $this -> setPattern ($pattern);
    }

    /**
     * Returns the pattern option
     * @return string
     */
    public function getPattern () {
        return $this -> _pattern;
    }

    /**
     * Sets the pattern option
     * @param string $pattern
     * @throws Zend_Validate_Exception if there is a fatal error in pattern matching
     * @return Zend_Validate_Regex Provides a fluent interface
     */
    public function setPattern ($pattern) {
        $this -> _pattern = (string) $pattern;
        $status = @preg_match ($this -> _pattern, "Test");
        if (false === $status) {
            require_once 'Zend/Validate/Exception.php';
            throw new Zend_Validate_Exception ("Internal error while using the pattern '$this->_pattern'");
        }
        return $this;
    }

    /**
     * Defined by Zend_Validate_Interface
     * Returns true if and only if $value matches against the pattern option
     * @param string $value
     * @return boolean
     */
    public function isValid ($value) {
        if ( ! is_string ($value) &&  ! is_int ($value) &&  ! is_float ($value)) {
            $this -> _error (self::INVALID);
            return false;
        }
        $this -> _setValue ($value);
        $status = @preg_match ($this -> _pattern, $value);
        if (false === $status) {
            $this -> _error (self::ERROROUS);
            return false;
        }
        if ( ! $status) {
            $this -> _error (self::NOT_MATCH);
            return false;
        }
        return true;
    }

}
